Limit Public Deck Search

Using the regex `.` returns all decks, which can be quite expensive to send that much data as we scale. Send a curated few decks by "ratings" or something similar instead.

Start by locating the public deck search handling and the path where regex `.` returns all decks. Determine how results are currently selected and sent, then define a bounded curated result set ordered by ratings or a comparable criterion. Done means public searches no longer return the full deck collection and the response remains limited as the project scales.

Written by the indexing model from the issue text.